Stapler



FIG. 1 is a top right perspective view of a stapler showing our new design;

FIG. 2 is a right view thereof;

FIG. 3 is a left view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a back view thereof.

The portions shown in phantom lines are not part of the claimed invention, but are included to show environment. 

The ornamental design for a stapler, as shown and described. 